JP2018135117A - Packaging box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging box 1 in which a bottom opening of a body part 2 having a square cylindrical shape is closed as the box is formed three-dimensionally from the state in which the body part 2 is folded, and in which a gap is less likely to occur in the bottom opening even when a bottom part 4 for closing the bottom opening is pushed inwardly from the outside, without providing a portion protruding in an internal space at the bottom part 4 of the body part 2.SOLUTION: A front bottom lid piece 41 and a rear bottom lid piece 42 for closing a bottom opening of a body part 2 is locked by a lock part 5 so as not to move from the outside to the inside. The lock part 5 is constituted by: a lock piece 51 provided at the rear bottom lid piece 42; and a part 52 to be locked which is provided on a front wall surface 21 side, and in which a tip side of the lock piece 51 is hooked from the outside (lower side) toward the inside (upper side).SELECTED DRAWING: Figure 1

Description

  The present invention relates to a packaging box having a structure in which a bottom opening of a quadrangular cylinder-shaped body is closed as the body is folded from the folded state. Such a packaging box is a known packaging box called a “lock bottom carton (automatic)”.

  Examples of conventional packaging boxes of this type include those shown in Patent Documents 1 to 3.

  In Patent Document 1, there is a bottom-lock type packaging box that can be assembled simply by automatically raising a folded square cylindrical sleeve, and even if the bottom lid piece is pressed inward after assembly, A lock structure for preventing a gap between the bottom lid pieces is described.

  The lock structure is configured such that, at the time of assembly, the protruding portion formed on the front side plate bottom piece is inserted into a notch provided on the fold line between the back side plate and the back side plate bottom piece.

  Patent Document 2 discloses a bottom lock type packaging box that can be assembled simply by raising a flat folded blank into a square cylinder, and the bottom cover piece is pressed inward after assembly. A lock structure for preventing a gap between the bottom lid pieces is described.

  The lock structure is configured such that, at the time of assembly, the protruding piece formed on the back side plate bottom piece is inserted into a cut formed in the front side plate bottom piece.

  Patent Document 3 discloses a bottom-lock type packaging container that can be assembled simply by raising a flat folded blank sheet in a box, and the bottom is pressed inward while being raised in the box. The lock structure for making it difficult to produce a clearance gap in the said bottom face is described.

  In this lock structure, a partition piece that rises upward is provided at the tip of a pair of long surface flaps (bottom pieces) that are opposed to the bottom opening, and a lock piece is provided in the vicinity of the fold of each partition piece. The partition piece and the lock piece are engaged with each other so as to make it difficult to form a gap on the bottom surface.

JP 2006-69563 A Japanese Patent No. 4710279 JP 2011-225254 A

  In the above Patent Documents 1 to 3, although a lock structure for making it difficult for a gap to occur on the bottom surface is provided, there is room for improvement in the lock structure.

  In the lock structures of Patent Documents 1 and 2, since the projecting portion (projecting piece) and the cut are provided on the bottom piece, the projecting portion (projecting piece) is not cut when the bottom piece is pressed inward. There is concern that it will be easy to come off.

  In addition, the lock structure of Patent Document 3 is configured such that both of the partition pieces stand up in the internal space of the box, so that the content of the contents to be accommodated in the internal space is obstructed by the partition pieces. There is a concern that the shape is limited.

  In view of such circumstances, the present invention provides a bottom plate that closes the bottom opening in a packaging box having a structure in which the bottom opening of a quadrangular cylinder-shaped body is closed when the body is folded from the folded state. An object of the present invention is to make it difficult to form a gap in the bottom opening even when a bottom plate that closes the bottom opening is pressed inward from the outside without providing a portion protruding into the internal space.

  The present invention is a packaging box having a structure in which a bottom opening of a quadrangular cylinder-shaped body is closed as the body is folded from the folded state, and is formed on the bottom of four wall surfaces on the front, rear, left and right of the body. The bottom cover pieces are connected to each other, and the bottom cover piece (third bottom cover piece) adjacent to the bottom cover piece (first bottom cover piece) is adhered to the bottom cover piece. A bottom cover piece (fourth bottom cover piece) adjacent to the cover piece (first bottom cover piece) and a bottom cover piece (second bottom cover piece) at a position opposite to the cover piece (first bottom cover piece) is attached, and the body is three-dimensionalized. Accordingly, when the bottom opening is closed by the polymerization of the first bottom cover piece and the second bottom cover piece, the first and second bottom cover pieces do not move from the outside to the inside. A lock portion that locks to the second bottom cover piece, and a lock piece that locks the four wall surfaces. In other words, the first bottom cover piece is provided on the first wall surface side where the first bottom cover piece is connected, and the front end side of the lock piece is constituted by a locked portion that is hooked from the outside to the inside of the body. It is said.

  In this configuration, when the first and second bottom cover pieces close the bottom opening of the body as the body is three-dimensionalized, the distal end side of the lock piece is hooked on the locked portion. Thus, the closed state is locked.

  In this state, even if the first and second bottom cover pieces are pressed from the outside to the inside, the lock piece acts so as to be strongly caught. Therefore, the first and second bottom cover pieces are The shape of the packaging box after the three-dimensionalization can be stably maintained, such as being unable to move inwardly.

  Accordingly, the bottom opening of the body is not opened, and a gap is hardly formed in the bottom opening.

  As a result, it becomes possible to prevent unauthorized opening of the bottom portion of the packaging box, so that it is possible to prevent tampering such as contents being pulled out or foreign matter being put in. Moreover, since the sitting of the packaging box becomes stable, the contents can be loaded smoothly.

  Moreover, in the configuration of the present invention, unlike the above-mentioned Patent Document 3, there is no portion protruding in the internal space of the body, so that the shape of the contents to be accommodated in the internal space is not limited. .

  By the way, the upper side of the first wall surface is connected to a sticking piece that is bent inward so as to be superposed on the inner surface of the first wall surface and to which the superposed portion excluding the tip side is stuck. The locking piece is provided so as to extend to the second bottom lid piece, and the locked portion is a non-adhering portion between the distal end side of the attaching piece and the inner surface of the first wall surface. It is preferable to adopt a configuration in which the gaps are formed as opposed to each other.

  Here, the lock piece and the locked portion are specified. With this specification, in the process in which the second bottom cover piece is bent so as to close the bottom opening, the lock piece of the second bottom cover piece comes into contact with the inner surface of the first bottom cover piece and is gradually bent. At the same time, the lock piece is inserted into the facing gap in the final folding stage.

  The upper side of the first wall surface is connected to an adhesive piece that is bent inward so as to be polymerized on the inner surface of the first wall surface and to which the overlapping portion excluding the tip side is attached. The second bottom cover piece is connected to an extension piece that forms a holder for holding the contents, and the lock piece forms a notch in the front plate portion of the holder in the extension piece. And the locked portion is a facing gap formed between the tip end side of the sticking piece and the inner surface of the first wall surface. It is preferable.

  Here, a holder is provided in the internal space of the packaging box, and it is specified that a cut-and-raised piece serving as the lock piece is formed in the holder. This specification facilitates the realization of the invention, such as clarifying the overall shape of the packaging box according to the present invention.

  According to the present invention, it becomes possible to stably maintain the three-dimensional shape of the packaging box, to prevent unauthorized opening of the bottom of the packaging box, and for the contents to be accommodated in the internal space. Usability is improved, for example, the shape is not restricted.

It is a perspective view which fractures | ruptures and shows a part of one Embodiment of the packaging box which concerns on this invention. It is a side view which makes the packaging box of FIG. 1 a cross section in the up-down direction. It is a plane expanded view of the court ball of the packaging box of FIG. It is a figure which shows the initial stage of the assembly procedure of the court ball | bowl of FIG. It is a figure which shows the continuation of FIG. It is a figure which shows the continuation of FIG. It is a figure which shows the continuation of FIG. It is a top view which shows the initial stage of the process which three-dimensionalizes from the state which folded the packaging box of FIG. 1 flatly. It is a top view which shows the continuation of FIG. FIG. 10 is a continuation of FIG. 9 and is a cross-sectional view taken along the line (10)-(10) of FIG. It is a perspective view which fractures | ruptures and shows a part of other embodiment of the packaging box based on this invention. It is a side view which shows the packaging box of FIG. It is a plane expanded view of the court ball of the packaging box of FIG. It is a figure which shows the initial stage of the assembly procedure of the court ball | bowl of FIG. It is a figure which shows the continuation of FIG. It is a figure which shows the continuation of FIG. It is a figure which shows the continuation of FIG. It is a figure which shows the continuation of FIG. In the packaging box of FIG. 11, it is a figure which shows a mode that a lock piece is bend | folded in the process which is three-dimensionalized from the state folded flat. It is a perspective view which fractures | ruptures and shows a part of other embodiment of the packaging box based on this invention. It is a side view which makes the packaging box of FIG. 20 a cross section in the up-down direction. FIG. 21 is a plan development view of a coated ball of the packaging box of FIG. 20. It is a figure which shows the initial stage of the assembly procedure of the court ball | bowl of FIG. It is a figure which shows the continuation of FIG. It is a figure which shows the continuation of FIG. FIG. 26 is a diagram showing a continuation of FIG. 25. It is a figure which shows the continuation of FIG. In the packaging box of FIG. 20, it is a figure which shows a mode that a lock piece is bend | folded in the process which is three-dimensionalized from the state folded flat.

  BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the accompanying drawings.

  1 to 10 show an embodiment of the present invention. In the figure, 1 indicates the entire packaging box.

  The packaging box 1 is assembled by punching out a coated ball punched into a predetermined shape as shown in the development view of FIG. In addition, the coated ball shown in FIG. 3 shows a state in plan view of the inner surface of the packaging box 1.

  Specifically, the packaging box 1 is a rectangular packaging box called a known “lock bottom carton (automatic)”, and the body 2 that is folded and flattened is formed into a rectangular cylinder. Accordingly, the bottom opening of the body 2 is configured to be closed.

  The body 2 includes four wall surfaces (a front wall surface 21 serving as a first wall surface, a rear wall surface 22 serving as a second wall surface, a left wall surface 23 serving as a third wall surface, and a right wall surface 24 serving as a fourth wall surface) A lid 3 and a bottom 4 are provided.

  A left wall surface 23 and a right wall surface 24 are connected to the front wall surface 21 via fold lines 101 and 102, respectively. Further, the rear wall surface 22 is connected to the right wall surface 24 via the fold 103. Further, a glue margin plate 25 is connected to the rear wall surface 22 via a fold line 104. The front wall surface 21, the rear wall surface 22, the left wall surface 23, the right wall surface 24, and the glue margin plate 25 are each folded at the folds 101 to 104 and then the outer surface of the glue margin plate 25 is attached to the inner surface of the left wall surface 23. Thereby, the trunk | drum 2 is formed in a square cylinder shape.

  And the sticking piece 26 required in order to make the to-be-latched part 52 of the lock | rock part 5 mentioned below is connected with the front wall surface 21 via the crease | fold 105. FIG. The sticking piece 26 is bent inward so as to be superposed on the inner surface of the front wall surface 21, and the sticking piece 26 is attached to the superposed portion excluding its tip side, whereby the sticking piece 26 is attached. A facing gap is formed at a non-sticking portion between the tip side of the piece 26 and the inner surface of the front wall surface 21. This opposing gap becomes the locked portion 52.

  The lid 3 includes a lid piece 31, an upper left flap 32, and an upper right flap 33. The lid piece 31 is connected to the upper side of the rear wall surface 22 via a fold line 106. The upper left flap 32 is connected to the upper side of the left wall surface 23, and the upper right flap 33 is connected to the upper side of the right wall surface 24 via a crease (reference numeral omitted). An insertion piece 34 is connected to the lid piece 31 via a crease (reference numeral omitted).

  The bottom 4 has a configuration called a lock bottom, a one-touch bottom, or an auto bottom, and includes a front bottom lid piece 41, a rear bottom lid piece 42, a left bottom flap 43, and a right bottom flap 44.

  The front bottom lid piece 41 is on the lower side of the front wall surface 21, the rear bottom lid piece 42 is on the lower side of the rear wall surface 22, the left bottom flap 43 is on the lower side of the left wall surface 23, and the right bottom flap 44 is on the lower side of the right wall surface 24. They are connected via fold lines 111, 112, 113, 114.

  A left bottom flap 43 adjacent to the front bottom cover piece 41 is attached, and a right bottom flap 44 adjacent to the front bottom cover piece 42 is attached to the front bottom cover piece 41. Note that oblique folds 121 and 122 are provided at predetermined positions of the left bottom flap 43 and the right bottom flap 44, and regions (referred to as gluing regions) 43a and 44a on the tip side of the folds 121 and 122 are provided. It is attached to the front bottom cover piece 41 and the rear bottom cover piece 42.

  As will be described in detail later, the bottom 4 of the body 4 has a bottom opening of the front body cover piece 41, a rear bottom cover piece 42, a left bottom flap 43 and a right bottom flap as the flat body 2 is three-dimensionalized. 44 is closed by one touch.

  In the packaging box 1 of this embodiment, the front bottom cover piece 41 and the rear bottom cover piece 42 are pressed from the outside to the inside while the bottom opening of the body 2 is closed by three-dimensionalizing the flat body 2. It is provided with a lock portion 5 for locking them so as not to move when they are moved.

  The lock portion 5 includes a lock piece 51 and a locked portion 52 to which the distal end side of the lock piece 51 is locked.

  The lock piece 51 is connected to the rear bottom cover piece 42 so as to extend through the fold 131. The lock piece 51 is provided with two linear cuts 53 in the middle in the longitudinal direction so that the lock piece 51 can be easily hooked to the locked portion 52.

  The notch 53 is provided from the front end position of the lock piece 51 to the front position of the root (fold 131). The reason why the edge position near the base in the notch 53 is arranged in front of the base is that when the lock piece 51 is hooked on the locked portion 52 as the body 2 is three-dimensionalized, the inner region and This is because at least one of the outer regions is easily hooked to the locked portion 52.

  The locked portion 52 is provided on the front wall surface 21 side. As described above, the locked portion 52 is a facing gap formed at the non-sticking portion between the distal end side of the sticking piece 26 connected to the upper side of the front wall surface 21 and the inner surface of the front wall surface 21.

  The operation of hooking the lock piece 51 on the locked portion 52 will be described in detail later, but the rear bottom cover piece 42 is pressed downward (outward) at the final stage when the flat body 2 is three-dimensionalized. do it.

  In addition, in order to ensure the catching margin of the lock piece 51 with respect to the to-be-latched part 52 of the said non-sticking site | part, the protrusion dimension 201 of the lock piece 51 is the boundary (fold line 111) of the front wall surface 21 and the front bottom cover piece 41 ) To the tip of the sticking piece 26 is set larger than the interval 202 (see FIG. 2). This hooking cost can be set arbitrarily.

  Next, the assembly procedure of the packaging box 1 described above will be described.

  First, in the coated ball punched out as shown in the developed view of FIG. 3, an appropriate adhesive is applied to the inner surface of the sticking piece 26, and the sticking piece 26 and the front bottom cover piece 41 are respectively fold 105, The inner surfaces thereof are superposed on the inner surface of the front wall surface 21 by performing a 180-degree valley fold at 111 (see FIG. 4). Thereby, the inner surface of the sticking piece 26 is stuck to the inner surface of the front wall surface 21. However, the area | region except the front-end | tip side among the said superposition | polymerization parts of the sticking piece 26 is stuck. In other words, the predetermined area | region which goes to the root side from the front end side of the sticking piece 26 is made non-sticking.

  Thereafter, as shown in FIG. 4, the right bottom flap 44 is folded 180 degrees at the fold line 114 so that the inner surface thereof is superposed on the inner surface of the right wall surface 24, and as shown in FIG. The outer surface of the pasting region 44 a is overlapped with the outer surface of the right bottom flap 44 by folding the pasting region 44 a at the fold 122. Subsequently, the rear bottom lid piece 42 is folded 180 degrees at the fold line 112 to superpose the inner surface with the inner surface of the rear wall surface 22 (see FIG. 5).

  Furthermore, an appropriate adhesive is applied to the inner surface exposed on the front side of the glued region 44a of the right bottom flap 44, and the rear wall surface 22 is folded 180 degrees at the fold line 103, whereby the inner surface and the rear surface of the rear wall surface 22 are rearranged. The outer surface of the bottom cover piece 42 is superposed on the inner surface of the right wall surface 24, the outer surface of the sticking piece 26, and the outer surface of the front bottom cover piece 41 (see FIG. 6). As a result, the gluing area 44 a of the right bottom flap 44 is adhered to the outer surface of the rear bottom cover piece 42.

  Subsequently, as shown in FIG. 6, the left bottom flap 43 is folded 180 degrees at the fold 113 so that the inner surface is superposed on the inner surface of the left wall 23, and the gluing region 43 a of the left bottom flap 43 is creased. The outer surface of the gluing region 43 a is overlapped with the outer surface of the left bottom flap 43 by performing 180-degree mountain folding at 121.

  Then, by applying appropriate adhesives to the inner surface exposed on the front side of the gluing region 43a and the outer surface of the glue margin plate 25, the left wall surface 23 is folded 180 degrees at the crease 101, so that the inner surface is While superposing on the outer surface of the adhesive margin plate 25, the lower side of the margin margin plate 25 is sandwiched between the lower inner surface of the left wall surface 23 and the inner surface of the left bottom flap 43 (the root side region from the fold 121). (See FIG. 7). As a result, the inner surface of the left wall surface 23 is adhered to the outer surface of the adhesive margin plate 25, and the pasting area 43a of the left bottom flap 43 is adhered to the outer surface of the front bottom cover piece 41. As shown in FIG. 8, the body 2 that is folded and flattened is completed.

  Next, a procedure for three-dimensionalizing the body 2 that is folded and flattened as described above will be described.

  First, when the body 2 is pressed so as to be compressed from the arrow directions 401 and 402 in FIG. 8, the front wall surface 21 and the rear wall surface 22 are gradually separated from each other as shown by the two-dot chain line in FIG. 41 and the rear bottom cover piece 42 are inclined obliquely while being gradually separated from the front wall surface 21 and the rear wall surface 22 by being pulled by the glue region 43a of the left bottom flap 43 and the glue region 44a of the right bottom flap 44. Thus, the front bottom cover piece 41 and the rear bottom cover piece 42 come to be engaged, and the body 2 is three-dimensionalized in a substantially rectangular tube shape. At this time, as shown in FIG. 9 and FIG. 10, the lock piece 51 is not hooked to the locked portion 52.

  After that, when a finger or a rod-like member is inserted from the upper opening of the body 2 and the rear bottom lid piece 42 is pressed downward (outward) in the oblique posture, the rear bottom lid piece 42 is folded as shown in FIG. 112 is gradually bent downward (outward) with the fulcrum 112 as a fulcrum, and the tip of the lock piece 51 is brought into contact with the inner surface of the front wall surface 21 so that the lock piece 51 is folded from the fold 131 to the valley. It will gradually bend as you do.

  In the final stage of bending, when the front end side of the lock piece 51 exceeds the front end of the sticking piece 26 downward (outward), when the pressing force is released, the rear bottom cover piece 42 is folded by its elastic restoring force. 112 is used as a fulcrum to return upward (inward), and the distal end side of the lock piece 51 is located below the locked portion 52 formed by a gap facing the non-sticking portion between the front wall surface 21 and the sticking piece 26 ( It is hooked in such a form that it enters from the outer side to the upper side (inner side). As a result, the bottom opening of the body 2 is closed by the bottom portion 4, and the lock portion 5 is locked, thereby completing the assembly.

  When the assembly is completed in this way, even if the front bottom lid piece 41 and the rear bottom lid piece 42 are pressed from the lower side (outside) toward the upper side (inside), the lock piece 51 is strongly caught. Since it acts, the shape of the packaging box 1 after the three-dimensionalization can be stably maintained such that the front bottom lid piece 41 and the rear bottom lid piece 42 do not move upward (inward).

  This prevents the bottom opening of the body 2 from being opened and prevents the bottom 4 of the packaging box 1 from being lifted, such as making it difficult for a gap to be formed in the bottom opening.

  As a result, since the tampering of the bottom 4 of the packaging box 1 can be prevented, it is possible to prevent tampering such as content being pulled out or foreign matter being inserted. Further, since the sitting of the packaging box 1 is stabilized, the contents can be loaded smoothly.

  Moreover, since the packaging box 1 of this embodiment is not provided with a portion that protrudes into the internal space of the body 2 unlike the Patent Document 3, the shape of the contents to be accommodated in the internal space is not limited. Usability is improved.

  In addition, this invention is not limited only to the said embodiment, It can change suitably in the range equivalent to the claim and the said range.

  (1) For example, FIGS. 11 to 19 show other embodiments of the present invention. In this embodiment, the difference from the packaging box 1 of the above embodiment is mainly that a holder 6 for holding the contents is provided in the internal space, and other configurations are the packaging box of the above embodiment. Basically the same as 1.

  As shown in FIG. 13, the holder 6 includes a front plate portion 61 connected to the rear bottom lid piece 42 via a fold 131, and an upper plate portion 62 connected to the front plate portion 61 via a fold 141. The upper plate portion 62 is provided with a paste margin plate portion 63 connected through a fold 142, and the folds 131, 141, and 142 are each folded 90 degrees to form a rectangular tube shape. Is. The front plate portion 61, the upper plate portion 62, and the adhesive margin plate portion 63 correspond to the extension pieces described in the claims.

  The adhesive margin plate portion 63 is adhered to the inner surface of the rear bottom lid piece 42 with an appropriate adhesive. The upper plate portion 62 is provided with a number of holes 62a. The hole 62a is shaped to be able to be held by inserting a large number of bottles or the like.

  Near the lower side of the front plate portion 61, two lock pieces 51a are arranged side by side in the left-right direction. This lock piece 51a is made by being cut and raised from a U-shaped cut 53a formed in the front plate portion 61, and is cut and raised in the process of three-dimensionalizing the holder 6 into a rectangular tube shape, At the final stage, it is returned to the front plate portion 61 by the front wall surface 21 and is hooked on the locked portion 52 of the non-sticking portion.

  In addition, in order to ensure the catch margin of the lock piece 51a with respect to the to-be-latched part 52 of the said non-sticking site | part, the protrusion dimension 201 of the lock piece 51a is the boundary (fold line 111) of the front wall surface 21 and the front bottom cover piece 41 ) To the tip of the sticking piece 26 is set larger than the interval 202 (see FIG. 12). This catching cost can be set arbitrarily.

  Further, as shown in FIG. 13, both ends of the U-shaped notch 53a are arranged in front of the fold 131 of the front plate portion 61, and the fold 143 of the lock piece 51a is aligned with the fold 131 of the front plate 61. Are not parallel to each other and are offset in parallel.

  The reason for this is to make it easier for the lock piece 51a to jump out of the front plate portion 61 in the process in which the lock piece 51a is cut and raised from the cut 53a as the body 2 is three-dimensionalized. By doing so, when the lock piece 51 a is hooked on the locked portion 52, the lock piece 51 a is easily hooked on the locked portion 52.

  In addition to this, the gluing region 43a of the left bottom flap 43 is eliminated, and a gluing region 41a and a crease 123 are provided in the front bottom cover piece 41 instead.

  Next, the assembly procedure of the packaging box 1 described above will be described.

  In the coated ball punched out as shown in the development view of FIG. Specifically, an appropriate adhesive is applied to the outer surface of the adhesive margin plate portion 63 of the holder 6, and the adhesive margin plate portion 63, the upper plate portion 62, and the front plate portion 61 of the holder 6 are folded into fold lines 142, 141, respectively. By folding at 90 ° at 131, the holder 6 having a substantially rectangular tube shape is three-dimensionalized, and the outer surface of the glue margin plate portion 63 is adhered to the inner surface of the rear wall surface 22. At this time, the lock piece 51a is cut and raised from the cut 53a (see FIG. 14).

  Thereafter, an appropriate adhesive is applied to the inner surface of the sticking piece 26, and the sticking piece 26 is folded 180 degrees at the fold line 105, thereby polymerizing the inner surface to the inner surface of the front wall surface 21. Thereby, the inner surface of the sticking piece 26 is stuck to the inner surface of the front wall surface 21 (see FIG. 15). However, the area | region except the front-end | tip side among the said superposition | polymerization parts of the sticking piece 26 is stuck. In other words, the predetermined area | region which goes to the root side from the front end side of the sticking piece 26 is made non-sticking.

  Subsequently, the holder 6 once made three-dimensional as described above is flattened as shown in FIG. Specifically, by extending the fold line 142 and the fold line 131 so that the adhesive margin plate portion 63 and the upper plate portion 62 are flush with each other, and the front plate portion 61 and the rear bottom lid piece 42 are flush with each other, While superposing the outer surface of the upper plate portion 62 on the inner surface of the rear wall surface 22, the inner surfaces of the front plate portion 61 and the rear bottom cover piece 42 are superposed on the inner surface of the upper plate portion 62 and the inner surface of the adhesive margin plate portion 63. At this time, the outer surface of the front plate portion 61 and the outer surface of the rear bottom cover piece 42 are exposed on the front side.

  Further, in FIG. 14, the front bottom lid piece 41 is valley-folded by 180 degrees at the crease 111 to overlap the inner surface of the front wall surface 21 and the outer surface of the sticking piece 26, and the left bottom flap 43 and the right bottom flap 44 are rotated 180 degrees. The valley is folded and polymerized on the inner surfaces of the left wall surface 23 and the right wall surface 24 (see FIG. 15).

  Thereafter, as shown in FIG. 16, the outer surface of the glued area 44a is overlapped with the outer surface of the right bottom flap 44 by folding the glued area 44a of the right bottom flap 44 180 degrees at the crease 122, and the front bottom lid The outer surface of the pasting region 41 a is overlapped with the outer surface of the front bottom cover piece 41 by folding the pasting region 41 a of the piece 41 180 degrees at the fold 123.

  Then, an appropriate adhesive was applied to the inner surface exposed to the front side of the gluing region 44a of the right bottom flap 44 and the inner surface exposed to the front side of the gluing region 41a of the front bottom cover piece 41, and the flattening was performed. By folding the holder 6 and the rear wall surface 22 180 degrees at the crease 103, the outer surfaces of the rear bottom cover piece 42 and the front plate portion 61 are changed to the inner surface of the right wall surface 24 and the outer surfaces of the sticking piece 26 and the front bottom cover piece 41, respectively. (See FIG. 17). As a result, the outer surface of the rear bottom cover piece 42 is adhered to the inner surface of the gluing region 44 a of the right bottom flap 44.

  Subsequently, an appropriate adhesive is applied to the inner surface of the gluing region 41a of the front bottom cover piece 41 and the outer surface of the glue margin plate 25, and the left wall surface 23 is folded 180 degrees at the crease 101 while the glue is glued. By sandwiching the lower side of the base plate 25 between the lower side of the inner surface of the left wall surface 23 and the inner surface of the left bottom flap 43, the inner surface of the left wall surface 23 is attached to the outer surface of the adhesive piece 26 and the adhesive plate 25. While superposing each on the outer surface, the outer surface of the left bottom flap 43 is superposed on the inner surface of the gluing region 41a of the front bottom cover piece 41 (see FIG. 18). As a result, the outer surface of the left bottom flap 43 is adhered to the inner surface of the gluing area 41 a of the front bottom lid piece 41, and the inner surface of the left wall surface 23 is adhered to the outer surface of the glue margin plate 25. Thereby, the fuselage | body 2 which was folded and became flat is completed.

  Next, a procedure for three-dimensionalizing the body 2 that is folded and flattened as described above will be described.

  First, as in the above embodiment, when the body 2 is pressed so as to be compressed from both ends in the longitudinal direction, the front wall surface 21 and the rear wall surface 22 are gradually separated from each other, and the front bottom cover piece 41 and the rear bottom cover piece 42 are By being pulled by the gluing area 41a of the front bottom lid piece 41 and the gluing area 44a of the right bottom flap 44, the front bottom lid piece 41 is inclined obliquely while being gradually separated from the front wall surface 21 and the rear wall surface 22. And the rear bottom cover piece 42 are engaged with each other, and the body 2 is three-dimensionalized in a substantially rectangular tube shape. At this time, as shown in FIG. 19, the holder 6 is not completely three-dimensional, but the locked portion 51 a provided on the front plate portion 61 of the holder 6 protrudes. 52 is not in a state of being caught.

  After that, when a finger or a rod-like member is inserted from the upper opening of the body 2 and the upper plate portion 62 of the holder 6 in the oblique posture is pressed downward (outward), the holder 6 is glued as shown in FIG. The plate portion 63 is gradually tilted downward (outward) with the fulcrum serving as a fulcrum, and the tip of the lock piece 51 a comes into contact with the inner surface of the front wall surface 21.

  Subsequently, the lock piece 51a is gradually bent so as to be returned to the cut 53a so as to be flush with the front plate portion 61.

  In the final stage of this bending, when the front end side of the lock piece 51a exceeds the locked portion 52 (the gap between the front wall surface 21 and the sticking piece 26) downward (outward), When the pressure is released, the holder 6 and the rear bottom cover piece 42 return upward (inward) with the fold line 112 as a fulcrum by the elastic restoring force, and the front end side of the lock piece 51a is lowered to the locked portion 52. It is hooked in such a form that it enters from the (outside) to the upper side (inside). As a result, the bottom opening of the body 2 is closed by the bottom portion 4, and the lock portion 5 is locked, thereby completing the assembly.

  When the assembly is completed in this way, even if the front bottom cover piece 41 and the rear bottom cover piece 42 are pressed from the outside (lower side) to the inside (upper side), the lock piece 51a is strongly caught. Since it acts, the front bottom cover piece 41 and the rear bottom cover piece 42 do not move upward (inward). As a result, the bottom opening of the body 2 is not opened, and a gap is hardly formed in the bottom opening, so that the tampering of the bottom portion 4 of the packaging box 1 can be prevented. As a result, it is possible to prevent tampering such as contents being pulled out or foreign objects being inserted.

  Moreover, since the packaging box 1 of this embodiment is not provided with a portion that protrudes into the internal space of the body 2 unlike the Patent Document 3, the shape of the contents to be accommodated in the internal space is not limited. Usability is improved.

  Thus, also in this embodiment, basically the same operations and effects as in the above embodiment can be obtained.

  (2) For example, FIGS. 20 to 28 show another embodiment of the present invention. The packaging box 1 shown in this embodiment is different from the packaging box 1 shown in FIGS. 11 to 19 in that the width in the left-right direction of the packaging box 1 is reduced and the lock piece 51a is connected to the front plate portion of the holder 6. 61 is provided close to the upper plate portion 62, and the bottom portion of the holder 6 has a double bottom structure. Other configurations are basically the same as those of the packaging box 1 shown in FIG. Yes.

  As shown in the developed view of FIG. 22, the holder 6 includes a front plate portion 61 connected to the rear bottom cover piece 42 via a fold line 131, and an upper plate connected to the front plate portion 61 via a fold line 141. Portion 62, back plate portion 64 connected to this upper plate portion 62 via fold 151, bottom plate portion 65 connected to this back plate portion 64 via fold 152, and fold 142 to this bottom plate portion 65. And a paste margin plate portion 63 connected through the two, and three-dimensionalized into a rectangular tube shape by folding them 90 degrees at the respective fold lines 131, 141, 151, 152, 142. The front plate portion 61, the upper plate portion 62, the back plate portion 64, the bottom plate portion 65, and the adhesive margin plate portion 63 correspond to the extension pieces described in the claims.

  By the way, about the assembly procedure of the packaging box 1 of this embodiment, and the three-dimensional procedure of the trunk | drum 2, as shown in FIGS. 23-28, it is substantially the same as the three-dimensional procedure in the packaging box 1 shown in FIGS. Therefore, the detailed explanation here is omitted.

  Also in the packaging box 1 of such embodiment, the effect | action and effect basically the same as the said embodiment are acquired.

  (3) In the above embodiment, an example in which the number of the lock pieces 51a is two is given. However, the present invention is not limited to this, and a portion corresponding to the lock piece 51a is not shown. Can be, for example, one or more.

  INDUSTRIAL APPLICABILITY The present invention can be suitably used for a packaging box having a configuration in which a bottom opening of a quadrangular cylinder-shaped body is closed when the body is folded from the folded state.

1 Packaging box
2 Torso
21 Front wall (equivalent to the first wall)
22 Rear wall
23 left wall
24 Right wall
25 Paste board
26 Sticking pieces
3 Lid
4 Bottom
41 Front bottom cover piece (equivalent to the first bottom cover piece)
42 Rear bottom cover piece (equivalent to second bottom cover piece)
43 Left bottom flap (equivalent to third bottom lid piece)
43a Gluing area
44 Right bottom flap (equivalent to 4th bottom cover piece)
44a Gluing area
5 Lock part
51 Lock piece
52 Locked part

Claims (3)

The bottom opening of the rectangular cylindrical body is a packaging box configured to be closed as the body is folded from the folded state,
Bottom cover pieces are connected to the bottom sides of the four wall surfaces on the front, rear, left and right of the body,
Adjacent to the bottom cover piece (first bottom cover piece) is a bottom cover piece (third bottom cover piece) adjacent to the bottom cover piece (first bottom cover piece). A bottom cover piece (fourth bottom cover piece) adjacent to the bottom cover piece (second bottom cover piece) at the position is attached,
When the first bottom cover piece and the second bottom cover piece are superposed with each other as the body is three-dimensionalized, the bottom opening is closed. There is a locking part that locks it so that it does not move inward.
The lock part is provided on a lock piece provided on the second bottom cover piece, on a first wall surface side where the first bottom cover piece is connected among the four wall surfaces, and a front end side of the lock piece is the body. A packaging box comprising: a locked portion that is hooked from the outside to the inside. In the packaging box according to claim 1,
The upper side of the first wall surface is connected to an adhesive piece that is bent inward so as to be polymerized on the inner surface of the first wall surface and to which the polymerized portion excluding the tip side is attached,
The lock piece is provided to extend to the second bottom lid piece,
The packaging box, wherein the locked portion is an opposing gap formed at a non-sticking portion between a tip side of the sticking piece and an inner surface of the first wall surface. In the packaging box according to claim 1,
The upper side of the first wall surface is connected to an adhesive piece that is bent inward so as to be polymerized on the inner surface of the first wall surface and to which the polymerized portion excluding the tip side is attached,
An extension piece that forms a holder for holding the contents is connected to the second bottom lid piece,
The lock piece is a cut-and-raised piece obtained by forming a cut in the front plate portion of the holder in the extension piece,
The packaging box, wherein the locked portion is an opposing gap formed at a non-sticking portion between a tip side of the sticking piece and an inner surface of the first wall surface.

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